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3 Acta Physiologiae Plantarum

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Environmental factors’ effect on seed germination and seedling growth of chicory (Cichorium intybus L.) as an important medicinal plant

100%

Vahabinia P. , Pirdashti H. , Bakhshandeh E.

Acta Physiologiae Plantarum

2019

tom 41

nr 02

A new halothermal time model describes seed germination responses to salinity across both sub- and supra-optimal temperatures

88%

Bakhshandeh E. , Bradford K. J. , Pirdashti H. , Vahabinia F. , Abdellaoui R.

Acta Physiologiae Plantarum

2020

tom 42

nr 08

Hydrothermal time analysis of watermelon (Citrullus vulgaris cv. ‘Crimson sweet’) seed germination

88%

Bakhshandeh E. , Atashi S. , Hafeznia M. , Pirdashti H. , Teixeira de Silva J. A.

Acta Physiologiae Plantarum

2015

tom 37

nr 01

This study evaluated the ability of a hydrothermal time model (HTT) to describe the kinetics of watermelon (Citrullus vulgaris cv. ‘Crimson sweet’) seed germination under different temperatures (T) and water potentials (ψ) and also to determine the cardinal temperatures of watermelon. Results indicated that ψ influenced germination rate and germination percentage. For this seed lot, cardinal temperatures were 10℃ for Tb, 28.34℃ for To and 40.8℃ for Tc in the control (0 MPa) treatment. There was a decrease in hydrotime constant (θH) when T was increased to To and then remained constant at supraoptimal temperatures (30 MPah⁻¹). Also, at temperatures above To, ψb(50) values increased linearly with T. The kT value (the slope of the relationship between ψb(50) and T exceeds To) of this seed lot was calculated as 0.076 Mpa℃ h⁻¹. Results this study show that when the HTT model is applied, it can accurately describe ψb(g) and the course of germination around Ts (R² = 0.82). Moreover, the ψb(50) was estimated to be -0.96 MPa based on this model. Consequently, the germination response of watermelon for all Ts and ψs can be adequately described by the HTT model and enabling it to be used as a predictive tool in watermelon seed germination simulation models.